Began with Department of Horticulture, St. Louis Exposition, 1904. Practiced in Nebraska, 1904-1907. Professor and head department horticulture, Baron de Hirsch Agricultural School, Woodbine, New Jersey, 1907-1910.
Assistant professor horticulture, Pennsylvania State College, 1910-1913. Professor, chief of division and consultant in landscape design University of California, 1913-1947. Emeritus professor of landscape design from June 30, 1947.
Developed parks and park system of Berkeley, campus of University of California at Berkeley, Los Angeles, Riverside, Davis and La Jolla school grounds, parks private estates in various parts of California.